What do ‘unique bidders’ and ‘unique bids’ mean on the auction reports page?
Edited
Unique bidders means total registered bidders that have placed bids. Suppose the auction has 200 bidders, but only 107 have placed bids on the auction. Then, the unique bidders will be 107.
Unique bids: This number is equal to the number of 'accepted' bids in an auction
If we export the ‘accepted' bids in an auction, we can see that the number of bids in the CSV file matches the total of unique bids on the report page (2064 unique bids).